Loco motive-boiler



(NoModx.) 2"sheets-sheet 1.v

- M. W. HAZELTON.

LoooMoTIVE BOILER. No. 311,318. Patented Jan. 27, .1.885.

Mild? ATTORNEY (No Mode.) 2- Sheets-Sheet 2.

LOMOTIVB BOILER.

110. 811,818. 118.1611188 Jan. 27, 1885.`

- I VENTR ATTORNEY N PETERS. Puma hummm-er. wnshmgwn, n. c.

MILTON IV. HAZELTON,

artnr irren.

OF OHIOAG O, ILLINOIS.

LOCOIVIOTIVEnBOlLER.

SPECIFICATION forming part of Letters Application filed April 29, 1884.

To all whom t may concern:

Be it known that I, MILTON W'. HAZELTON, a citizen of the United States of North America, and a resident of Chicago, county of Cook, State of Illinois, have invented a new and useful Improvement in Locomotive-Boilers, of which the following is a specification.

rIlhis invention relates to improvements in boilers ofthe locomotive type, and has forits objects the increase of heatingsurface and the quick generation of steam.

rIhe invention consists in making the coinbustion-chamberextend the whole length ofthe boiler, in constructing the boiler with double shell,with water-tubes instead of hotair lues, and in arranging said tubes transversely across the boiler, projecting inward horizontally' from and communicating with the side waterspaces.

Reference is to be had to the accompanying drawings, 'forming part of this specification, in which similar letters of reference indicate corresponding parts in all the iigures.

Figure lis a longitudinal partly-sectional side elevation of 4my improved boiler with parts broken away to exhibit other parts. Fig. 2 is a crossesectional elevation on line x m, Fig. l. Fig. 3 is a cross-sectional elevation on line y y, Fig. l.

In my improved locomotive-boiler the shell is made double throughout from the front to the uptake E, the space C between the outery shell, A, and the inner shell, B, being the water-space. The combustionchamber I) also extends from the front of the boiler tothe uptake, as shown, the iire-box F being the space between the grate-bars G and the detlectingplate II. The shells A B are designed to be suitably stayed by stay bars and bolts c b, respectively, and the shell-sections are to be riveted together in the usual manner. The water-tubes I, whose inner ends are closed, project into the combustion'chamber D from both sides, being inserted through corresponding holes in the inner shell, B, and being retained therein by having their open ends eX- panded. Opposite the tube-holes in the inner shell, B, holes c are made in the outer shell, A, through which the expanding-tool is passed for expanding t-he tubes in place, and

Patent No. 311,318, dated January 27,1885.

(No model.) u

after the latter are in position and the eX- panding-tool is withdrawn these holes c are closed by plugs d, as shown. All the tubes I projecting from the opposite sides of the boiler are made of such alength that aspace, f, extending the whole length of the combustion-chamber is left between the ends of those on one side and those on the other side, in order that the hot air and gases from there-box may have more free circulation, and that the contraction and expansion of the tubes shall not affect the boiler-shell, as would be the case if the tubes were continuous from side to side. These tubes I may also be provided with longitudinal diaphragms, as indicated at g,which will cause the water to pass over a large surface in each tube, as it will pass into it below the diaphragm and leave it above, thus creating a rapid circulation, which will not only keep the tubes clear from sediment, but will 7o compel the water in each tube to pass from one end to the other, and thus all the waterin said tube will pass successively over the hottest part thereof.

In constructing my improved locomotiveboiler for burning anthracite coal, I place tubes I directly above the tire-box, as shown, and protect the same from the intense heat of conibustion by the deilector H; but in a locomotive-boiler designed for burning wood or bituminous coal I dispense with the water-tubes just above the {1re-box, so that a larger uninterrupted combustion-room is afforded,

The tubes I may be set in horizontal planes one above another, or may be set staggering, as may be desired, and in either case they present a much more extended heating-surface than is found in the ordinary locomotive ilue-boiler, and they present the water to the eii'ect ot' the products of combustion in so subdivided a condition that steam can be most rapidly generated in them.

It is not believed that the objects of eXtensive heating-surface and quick steaming in a boiler can be more fully attained than with a boiler having flat sides and transverse watertubes, as herein shown.

I am aware of the English Patent No. 13,843 of 1851, covering various boiler constructions, and that drop-tubes7 or water-tubes extend roo ing part Way linto a combustion-chamberhave been used in boiler construction, and hence do not broadly claim them; but,

Having thus described my invention, I claim as new and desire to secure by Letters Patent- A boiler of the locomotive type, consisting of the following elements: inner and outer shells, B and A, iirmly stayed by bars a and bolts b, tubes I, rigidly attached to the shell B, andextendinginwardlytherefromintothecombustion-chamber, leaving a space, f, between their free ends, and a clear space above `said tubes and between the same and the top of the i shell B, openings c in the outer shell coincident with said tubes I, plugs d, closing Vthe same, and the delector H, protecting the tubes immediately over the fire-chamber F, the parts being combined, arranged, and operating substantially as and for the purposes specified.

In testimony that I claim the foregoing as my invention I have signed my nan1e,in presence of two witnesses, this 18th day of April, 1884.

MILTON WV. HAZELTON. 

